. Bulletin. Science. SAN GABRIEL RIVER WATER QUALITY 100% 131 A) 80% & 60 % £= <D =5 £ 40 % 20% 0% CC storm drains SGR storm drains SJC storm drains WC storm drains All Storm Drains. 1Q< 103 102 101 10° Flow(L sec") 10! 10:' 103 B) 100% 80% fr 60 % c 0) 3 CT (D £ 40 % 20% 0% 2002 flow 2003 flow 10 10 10- 10' 10° Flow(L sec"1) 10' 10:' 103 Fig. 3. Distribution of observed storm drain flows by sampled stream (A) and by survey for all flowing storm drains sampled in the SGR watershed (B). Flow Nearly 80% of measured flow in the SGR watershed was from the WRPs during both surve
. Bulletin. Science. SAN GABRIEL RIVER WATER QUALITY 100% 131 A) 80% & 60 % £= <D =5 £ 40 % 20% 0% CC storm drains SGR storm drains SJC storm drains WC storm drains All Storm Drains. 1Q< 103 102 101 10° Flow(L sec") 10! 10:' 103 B) 100% 80% fr 60 % c 0) 3 CT (D £ 40 % 20% 0% 2002 flow 2003 flow 10 10 10- 10' 10° Flow(L sec"1) 10' 10:' 103 Fig. 3. Distribution of observed storm drain flows by sampled stream (A) and by survey for all flowing storm drains sampled in the SGR watershed (B). Flow Nearly 80% of measured flow in the SGR watershed was from the WRPs during both surveys (Table 4). The majority originated from the San Jose Creek WRP, and discharged either to the confluence of San Jose Creek and San Gabriel River or through a pipeline that discharged to the San Gabriel River 16 km downstream of the confluence. Over 80% of the storm drains and large NPS discharges carried flows less than 28 L s1 (1 cfs) (Figure 3). Flows over 5 L s1 comprised the top 30% of the flowing drains and were comparable between the two surveys. Higher proportions of storm drains had small flows (, below 5 L s1) in 2002 as compared to 2003. These differences at storm drains with very low flow may be due to true interannual variability, but could also be an artifact of the inherent. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Southern California Academy of Sciences. Los Angeles, Calif. : The Academy
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